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DIN 50930 6 PDF

Buy DIN CORROSION OF METALS – CORROSION OF METALLIC MATERIALS UNDER CORROSION LOAD BY WATER. As the effect of metallic materials on the quality of drinking water is not covered by these standards, DIN has been introduced at the. DIN October Corrosion of metals – Corrosion of metallic materials under corrosion load by water inside of pipes, tanks and apparatus – Part 6.

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Protection of metallic materials against corrosion. July Number of pages: B values for various components and materials B Sanitary valves and pipe fittings including compression couplings of Cu-Sn-Zn alloys or Cu-Zn alloys, in systems of any di Adaptors and connectors of Cu-Sn-Zn alloys or Cu-Zn alloys in systems where other elements are made of the same material Pipe fittings, adaptors and connectors of Cu-Sn-Zn alloys or Cu-Zn alloys for use in service lines of plastics Pipe fittings, adaptors and connectors of Cu-Sn-Zn alloys or Cu-Zn alloys for use in systems e.

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Assessing the suitability of a material for use with djn particular quality of water and for other applications than those listed here is very difficult, however, and should only be carried out by experts having suitable training and experience, using data gained in measurements performed as specified in DIN and evaluated as in DIN and DIN In case of doubt, the German-language original should be consulted as the authoritative text.

If B is greater than or equal to 0,5 see table 3 dij, materials which tend to form scale are not to be used if: If the legal requirements for drinking water quality cannot be met in existing systems due to poor water quality, adverse operating conditions or the selection of unsuitable materials, measures can be taken to correct di by treating the water. As the effect of metallic materials on the quality of drinking water is not covered by these standards, DIN has been introduced at the national level.

Corrosion of metals – Corrosion of metallic materials under corrosion load by water inside of tubes, tanks and apparatus – Part 6: Discover also Certification, assessment, diagnosis Get a quote for certification of systems, products or services, and get certified.

When assessing water whose composition changes over time, time series data are more significant than maximum and minimum values. Table 3 gives values for B.

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Code s Theme s In accordance with the sampling schedule specified in DINin which stagnation times alternate with short phases during which the water flows, samples of water conveyed in systems containing materials which tend to form scale are to be taken after stagnation times ranging from 0,5 hours to 16 hours, with eight samples making up a sampling interval, T.

There are no limitations for the use of unalloyed steel, hot-dip galvanized steel, stainless steel, copper and copper alloys for water heaters, due to the low B values of the heaters, as long as they are operated as intended i.

Where phosphorus and silicon compounds are fed centrally, the phosphorus and silicon contents are to be stated separately. November Number of pages: Beaulier Date of publication: Therefore, unprotected unalloyed or low-alloy ferrous materials are not to be used in such systems.

Sampling of stagnant water shall take place at intervals of 1 to weeks after commissioning see DIN for details. Bewertungsverfahren und Anforderungen hinsichtlich der hygienischen Eignung in Kontakt mit Trinkwasser.

Materials of a different composition than those listed below may be used if comparative tests carried out as specified in DIN show that an equivalent consumer protection is provided. A dkn in water quality due to interaction with a material is considered as corrosion damage if the drinking water no longer meets legal requirements as a result. Caution the offer 1 user is reserved for fin single user, any broadcast even within his company is prohibited.

This clause gives information on the suitability of various materials based on water-related parameters without making reference to specific test results. All water parameters which promote surface corrosion also affect the water quality.

DIN (英文版)金属腐蚀管、槽及装置内水造成金属材料腐蚀 第6部 饮用水成分影响_图文_百度文库

These changes are due to microbiotic processes, as well as to the materials with which the water is in contact. As there has not been enough experience with Cu-Ni alloys, limits cannot be specified and testing as in DIN 05930 to be carried out. Purchase More information add to basket.

In domestic systems, the flow rate dln greatly and the water remains stagnant for prolonged periods, preventing the formation of protective layers of scale.

Guidance on the assessment of corrosion likelihood in water distribution and storage systems. Table 1 lists the relevant methods of analysis. The properties of the materials used in the installation, the composition of the water itself, installation design and operating conditions may cause changes to the water quality, which like all comestibles, changes over time, i. Corrosion damage, which includes the release of solid and dissolved corrosion products into the water or the formation of corrosion products within the water, can only occur under certain operating conditions.

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In systems containing hot-dip galvanized ferrous materials, a change in drinking water quality in terms of its suitability for human consumption is deemed acceptable fin the following concentrations in the galvanized coating are not exceeded values given as percentages by mass: Where system components are of stainless steel, three samples are to be taken after stagnation times of 16, 36 and 72 hours, with the three results making up one 500930 interval.

These normative references are cited at the appropriate places in the text, and the titles of the publications are listed below. In this case sampling is to be performed at intervals of 4 weeks and 12 weeks after commissioning.

Influencing fin for stainless steels. Assessments may be made either on the basis of the information given in clause 8 or on the basis of data obtained in measurements carried out as specified in DIN To ensure this, there should be continuous flow in the idn, and the flow should be laminar or turbulent. There are no limitations for the use of small pipe and valve components e.

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The results of the analysis are to be checked for plausibility. Vitrified clay pipes systems for drain and sewers – Part 6: Unlike corrosion damage to components, corrosion damage to the water itself cannot generally be rectified by making alterations to operating conditions or changing waterrelated parameters. Alloying element Arsenic Lead Minor element w. In addition to water-related parameters, consumption behaviour is to be taken 509930 consideration when cin the suitability of a material for contact with drinking water.

Criteria are also given here for assessing the suitability of metallic materials for use in water supply systems; these criteria are based on investigations and practical experience.